<html lang="en" xmlns:th="http://www.thymeleaf.org"
      xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4">
<title>LogOut</title>
<head>
    <style type="text/css">
        #content{
            width: 350px;
            margin: auto;
        }
    </style>
</head>
<body>
<h1>登陆成功</h1>
<form th:action="@{/logout}" method="post">
    <input type="submit" class="btn btn-primary" value="注销"/>
</form>
</body>
</html>